Skewer

Since my workstand is one of the original Park workstands with no height adjustment and low height, I generally sit down on a low, plastic step stool while I work on my bikes. Sitting down with knees bent up requires a longer shop apron than when standing if you want to adequately protect most of the top of your pants between waist and knees. Does anyone know of a relatively long, shop apron that would still do the job protecting the top of the pants when sitting down on a low stool? I tried a Spin Doctor apron but thought it was too short to be of much use.